By Springer Matthew   Liu Keke   Guthrie James   in Education Economics

ISSN:1469-5782|17|4|421-444

Routledge Ltd‎(2009)‎

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By Springer Matthew L.   Kraft Peggy E.   Blau Helen M.   in Somatic Cell and Molecular Genetics

ISSN:0740-7750|24|5|281-289

Springer Publishing Company ‎(1998)‎

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